Commit 2cab6319 authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/pf: Expose SR-IOV policy settings over debugfs 



We already have functions to configure SR-IOV policies.
Allow to tweak those policy settings over debugfs.

Reviewed-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Acked-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240423131244.2045-4-michal.wajdeczko@intel.com
parent b00240b6

drivers/gpu/drm/xe/xe_gt_sriov_pf_debugfs.c

+53 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include "xe_gt_sriov_pf_control.h"

#include "xe_gt_sriov_pf_debugfs.h"

#include "xe_gt_sriov_pf_helpers.h"

#include "xe_gt_sriov_pf_policy.h"

#include "xe_pm.h"



/*
@@ -76,6 +77,57 @@ static const struct drm_info_list pf_info[] = { 
	},

};



/*

 *      /sys/kernel/debug/dri/0/

 *      ├── gt0

 *      │   ├── pf

 *      │   │   ├── reset_engine

 *      │   │   ├── sample_period

 *      │   │   ├── sched_if_idle

 */



#define DEFINE_SRIOV_GT_POLICY_DEBUGFS_ATTRIBUTE(POLICY, TYPE, FORMAT)		\

										\

static int POLICY##_set(void *data, u64 val)					\

{										\

	struct xe_gt *gt = extract_gt(data);					\

	struct xe_device *xe = gt_to_xe(gt);					\

	int err;								\

										\

	if (val > (TYPE)~0ull)							\

		return -EOVERFLOW;						\

										\

	xe_pm_runtime_get(xe);							\

	err = xe_gt_sriov_pf_policy_set_##POLICY(gt, val);			\

	xe_pm_runtime_put(xe);							\

										\

	return err;								\

}										\

										\

static int POLICY##_get(void *data, u64 *val)					\

{										\

	struct xe_gt *gt = extract_gt(data);					\

										\

	*val = xe_gt_sriov_pf_policy_get_##POLICY(gt);				\

	return 0;								\

}										\

										\

DEFINE_DEBUGFS_ATTRIBUTE(POLICY##_fops, POLICY##_get, POLICY##_set, FORMAT)



DEFINE_SRIOV_GT_POLICY_DEBUGFS_ATTRIBUTE(reset_engine, bool, "%llu\n");

DEFINE_SRIOV_GT_POLICY_DEBUGFS_ATTRIBUTE(sched_if_idle, bool, "%llu\n");

DEFINE_SRIOV_GT_POLICY_DEBUGFS_ATTRIBUTE(sample_period, u32, "%llu\n");



static void pf_add_policy_attrs(struct xe_gt *gt, struct dentry *parent)

{

	xe_gt_assert(gt, gt == extract_gt(parent));

	xe_gt_assert(gt, PFID == extract_vfid(parent));



	debugfs_create_file_unsafe("reset_engine", 0644, parent, parent, &reset_engine_fops);

	debugfs_create_file_unsafe("sched_if_idle", 0644, parent, parent, &sched_if_idle_fops);

	debugfs_create_file_unsafe("sample_period_ms", 0644, parent, parent, &sample_period_fops);

}



/*

 *      /sys/kernel/debug/dri/0/

 *      ├── gt0
@@ -261,6 +313,7 @@ void xe_gt_sriov_pf_debugfs_register(struct xe_gt *gt, struct dentry *root) 
	pfdentry->d_inode->i_private = gt;



	drm_debugfs_create_files(pf_info, ARRAY_SIZE(pf_info), pfdentry, minor);

	pf_add_policy_attrs(gt, pfdentry);

	pf_add_config_attrs(gt, pfdentry, PFID);



	for (n = 1; n <= totalvfs; n++) {